Standards Development

Scope

This International Standard specifies generic safety, constructional, performance, testing and documentation requirements for high pressure controls for use in gas transmission, distribution and installations (hereafter referred to as controls). This International Standard is applicable to controls with operating pressures up to and including 10 MPa for use with fuel gases as natural gas, manufactured gas or liquefied petroleum gas (LPG) in commercial, industrial installations, including fuel gas infrastructures. The test methods given in this International Standard are intended for product type test, routine tests and product surveillance tests.

This International Standard does not apply to: 

− controls upstream from/on/in domestic gas consuming appliances which are installed downstream of domestic gas meters;

− controls designed to be incorporated into pressure control systems used in service lines (pipework from the main pipework in a gas infrastructure to the point of delivery of the gas) with volumetric flow rate 200 m3/h at normal conditions and inlet pressure 500 kPa (5 bar);

− industrial process control valves, such as IEC 60534;

− controls used in aggressive/sour gas environments (gas environments containing water and H2S are considered sour) or severely corrosive conditions.

NOTE 1 In case renewables and, or waste gases, it is recommended to use this standard only if additional information is provided (e. g. contaminant, liquid etc.).

NOTE 2 For protection against outdoor environment, additional information is to be provided

Purpose

There is an identified need by component manufacturers (i.e., suppliers) for an International Standard that specifies generic safety, constructional, performance, testing and documentation requirements for high pressure controls for use in gas transmission, distribution and installations and that is applicable to controls with operating pressures up to and including 10 MPa for use with fuel gases as natural gas, manufactured gas or liquefied petroleum gas (LPG) in commercial, industrial installations, including fuel gas infrastructures. This standard will allow manufacturers to evaluate their high pressure controls that serve their customer’s needs. In North America and perhaps other parts of the world, minimum standards exist for the evaluation of high pressure controls identified under the scope of this proposed standard.

Just as important to the justification of this new work item is the scope of the relevant Technical Committee, ISO/TC 161, Controls and protective devices for gas and/or oil burners and appliances. The high pressure controls are well defined as being under the scope of this TC. In addition, the scope of TC 161, or the Strategic Business Plan, does not limit itself to only safety, and therefore performance related requirements such as these are indeed justified.